题解 | #句子逆序#

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);

        while (in.hasNext()) {
            String str =  in.nextLine();
            String[] arr = str.split(" ");
            if (arr.length > 1) {
                for (int i = arr.length - 1; i >= 0; i--) {
                    System.out.print(arr[i] + " ");
                }
            } else {
                char[] c = str.toCharArray();
                for (int j = c.length - 1; j >= 0; j--) {
                    System.out.print(c[j]);
                }
            }
        }

    }
}